Page 89 - Oxford_Grammar_for_Schools_3_Student_Book_Neat (1)

Have to, must,and shall

I can recognize and use have to and must for obligation, mustn't for prohibition
and shall for offers.

Have to and don't have to
Shall I tidy the That $ very kind of you,
arden for you? bc/t you ¿c¿on t have to.
Have to and don't have to are modal
verbs.We use have to to talk about
things that are important because of
rules and situations.
Mysister has to wear a school uniform.

I haveto wear glasses. Myeyes aren't
good.

We use don't have to to talk about
things that are not necessary.
You don'thave to buy a ticket. I'd ike to. OK, but you mustn't
Hedoesn't haveto work. Work too har¿\ J

Subject (don't) have to Base form Do/Does Subject have to Base form
I / we / you / have to Do I/we /you /they
leave now.
they don't have to ~ v have to stop?
work. Does he/she /it
has to
He/she/ it go.
doesn't have to Do youhaveto work? Yes, I do. / No,I don't.
Doesshe have to study? Yes, she does. / No,she doesn't.

* 1 O 16.1 Listen to the conversation.Then listen * 3 016.3 Listen and tick / the correct picture. o
Heidi: It's half past three! Ihave to go.9
and repeat.

Andy: Do you have to go right now? o ©|
Heidi: Yes, Ido. I have to be home at four.
&

*2 ©O 16.2 Listen again and answer the a ED
question.Then act out the conversation with O
a partner.
How do we pronounce have to?
a /htEV 13/ ÿ b /hicf ts/ ÿ

fv) t* i\ A !)

\t *J r I «/ íz
V
U
\6
\» «/ \í I
FREE
Ia! 1 b!

Unit 16 87